French Mathematician (21 results)

Stipple engraving, from Knight's "Gallery of Portraits", 1834.

Lithograph, from "Iconographie des Contemporains depuis 1789 Jusqu'a 1829".

Lithograph, from "Iconographie des Contemporains depuis 1789 Jusqu'a 1829", slight spotting on surround,

Stipple engraving, from Knight's "Gallery of Portraits",

Stipple engraving, from Knight's "Portraits", a little spotting on surround,

12mo, 2 pp, 11 lines. Concerns the 'porteur de ce billet', a 'M. Laudet', who has been the victim of 'un affreux malentendu'. 'Le malheureux perdait sa femme au moment où il manquait une garde'.

Written on both sides of the card, dimensions 5.5 x 9 cm. Good, with a little light scuffing on the front. Communication between two leading lights of French nineteenth-century mathematics. Printed text reads 'VICE-AMIRAL DE JONQUIERES | MEMBRE DE L'INSTITUT | AVENUE BUGEAUD, 2'. Asks Lalanne to 'inscrire Monsieur Bonnaffé, lauréat de l'Institut, parmi les lecteurs'.

12mo, 1 p, 12 lines. Inviting 'M.M. Dupont, père et fils' to help him eat 'le civet d'un lievre qui a eu la Bêtise de se laisser tuer par une femme du hameau du Mousseau'.

xl, 454 pages, 1 blank sheet. - Strong italian vellum binding of the period over 5 slightly raised bands with blank endpapers, all edges sparkled red; 8vo.(ca. 18 x 12 x 3 cm). *** [FRÜHLINGSVERKAUF-Endspurt, noch bis Montag den 25.05.2026 / Ultimate SPRING-SALE, only until Monday May 25th 2026: um über 35% REDUZIERTER PREIS / PRICE-REDUCTION of over 35%; ehemaliger Preis / previously EUR 265,-] --- COMPLETE ZANE-EDITION IN A ORIGINAL VELLUM-BINDUNG OF THE PERIOD; inner frontpanel with old (18th or 19th century) engraved holograph-augmented typographic Exlibris >BIBLIOTECA RICCARDI / in Modena / S. ''VII'' F. ''5'' N. ''61.''< --- Binding somewhat spotty, rearpanel slightly darker; endpapers vertically cut off at foredge (front ca. 4 cm, rear ca. 2 cm), interior frontjoint slightly split between front flyleaf and titlepage not affecting the tight binding; both sides of the woodblock-vignette at titlepage with ca. 2x2 cm cutouts, apparently to remove manuscript ownership inscriptions of the period (minimal rest - old ink - still visible); bottom of titlepage with 2 green round censorhip-stamps of the period 'Diocesa di Modena'; lower outer corner with shallow old humidity-stain from page 300-, upper outer corner with even smaller one from page 380 onwards. - A GOOD COPY.

Oblong 12mo. 1 p. Mounted on paper (4to). Curious letter addressed to the Chancellor of Austria, probably Rudolf Ramek, expressing his joy over a "new link" forged between the Republic of Austria and the French Republic by "the invention of Mr Belin". - Édouard Belin (1876-1933), who had studied photography at the Academy of Fine Arts in Vienna, is today best known as the inventor of the Bélinograph, an ancestor of the fax machine. Painlevé's message either refers to the Bélinograph or to Belin's brand of teleprinters that had been successfully established in 1925, although Belin was not the inventor of this technology. It is very likely that the letter was written during Painlevé's brief second term as Prime Minister of the French Republic (17 April - 22 November 1925). His Austrian homologue at the time was the conservative politician Rudolf Ramek. - Insignificant smudging.

Later finely bound half vermilion crushed cape levant morocco, the spine divided into six panels, lettered in the second and fourth, tooling to the others, green and red marble sides. 8vo. 8¼'' x 6¼''. Rubáiyát over 189 pages carrying the 110 quatrains of Edward FitzGerald's version enriched with 12 full-page tissue-guarded and mounted on grey card stock tipped-in colour plates by Edmund Dulac. In Fine condition. Member of the P.B.F.A. Rubáiyát of Omar Khayyám.

8vo. 1 p. on bifolium. Interesting letter from the year of Le Verrier's death to a fellow member of the Institut de France, requesting a meeting to resolve a conflict in which "the one and the other" was at fault: "De mon côté, j'ai réprimé mon desir d'aller vous voir pensant que je ne vous serais pas agréable. Nous avons eu tort l'un et l'autre : et deux au contraire grand ça ne va pas qu'il faut se voir afin de mieux aviser et de concerter la route à suivre, scientifique et politiquement. Ceci entendu, comme je vous verrai au plus tard d[ans] l'Institut, je n'en dis pas plus long". - Despite his sensational discovery of Neptune in 1846, Le Verrier had a difficult standing in the scientific community and was engaged in many arguments. In 1854, he first became director of the Paris Observatory but unhappiness over his management led to his removal from office in 1870. When his successor and adversary Charles-Eugène Delaunay drowned in 1872, Le Verrier was reinstated as director of the Observatory, albeit under close supervision. His name is among those of the 72 French scientists commemorated on the Eiffel Tower. - Minimally creased. With a collector's note in pencil.

4to. 2 pages on bifolium. In French. To the astronomer John Herschel, thanking for his work with Charles Babbage, with a recommendation from the general and engineer Guillaume Piobert, who hopes to meet Herschel in England, and regretting that he has not yet received a copy of his new paper on electrodynamic phenomena ("Théorie des phénomènes électro-dynamiques [.]", Méquignon-Marvis, 1826): "Monsieur, je désirais depuis longtemps vous écrire pour vous remercier de l'envoi que vous avez bien voulu me faire de plusieurs des ouvrages dont vous êtes l'auteur ou que vous avez publiés en commun avec monsieur Babbage [.]".

4to. 1 p. Printed letterhead of Institut de France". Water stains. Darboux is informing Dr. Liapounoff of the dath of the mathematician Charles Hermite.

Large 8vo. 3 pp. on bifolium. Probably to the politician and writer Jean-François Roger, editor of a bilingual edition of Joseph de Jouvency's "Appendix de diis et heroibus poeticis" for the study of Ovid. Ampère was charged by the "Commission des livres classiques" of the ministry of public instruction to evaluate the possible use of this publication as a textbook. He advises against discarding any parts of the notes: "indispensable for a beginner who would study alone, they cannot be regarded as useless for students in the various institutions of public instruction" (transl.). Ampère lauds the translations in "correct French" as "the best manner to make difficult passages understood". The only problem would be "the impossibility to examine pupils based on a copy of the book, where they see what they need to say at the bottom of the page". Therefore, Ampère conceives a system of cross-references that would allow for separating text and translation. But he immediately rejects his own ideas since they "probably have no foundation" and he might appear a second-guesser ("faire complètement le gros-jean"). - Ampère only calls the book in question "Appendix", and it is not quite clear which edition he refers to. Jean-François Roger (1776-1842) had first published his Latin-French version in 1806 and several editions followed when it was adopted as a textbook by the "Commission des livres classiques". Both Roger and Ampère were members of the Commission, and as Ampère addresses the recipient as his colleague, it is very likely that this was indeed Roger. - With a collector's note in pencil. Minor browning.

Folio. 1 p. and four lines on bifolium. List of expenses for extensive fortification works executed in June, 1800 on Roda island ("isle de Raouda") located on the Nile in Cairo. The total costs, including the wages of a water carrier and a cameleer, amouted to 72,848 francs that were comfortably within the budget of 84,000 francs. - After the assassination on 14 June 1800 of General Jean-Baptiste Kléber, who had been in command of the "Armée d'orient" since Napoleon's departure, the collapse of the French occupation of Egypt was imminent. The Anglo-Ottoman offensive started in March 1801 and reached Cairo by May. On 22 June the French garrison under Augustin Daniel Belliard surrendered and withdrew to Alexandria. The siege of Alexandria from 17 August to 2 September put an end to the Egyptian campaign with the remaining French troops, including Malus, being repatriated to France on British ships according to the terms of the capitulation agreement. - Étienne-Louis Malus was trained to become a military engineer at the École royale du génie de Mézières and the École Polytechnique in Paris. In 1796 he joined the Engineers Corps of the revolutionary army and quickly ascended the ranks. His scientific career started during the Egyptian campaign when he became a member of the newly founded Institut d'Égypte. Malus' mathematical work was almost entirely concerned with the study of light; he is known for Malus's law, giving the resultant intensity, when a polariser is placed in the path of an incident beam. In 1810 Malus was elected into the Académie des Sciences. That same year the Royal Society of London awarded him the Rumford Medal. - Well preserved with small pinholes along left hand edge of the document.

Folio. 1½ pp. List of expenses for work performed by the French army in Giza and on Roda island located on the Nile in Cairo. A summary of fortification and building costs with the corresponding budgets certified and signed by Malus. The total cost amounted to 101,782 francs. - Written shortly before Napoleon's unexpected departure from Egypt, the list bears witness to the extensive French building campaign during the Egyptian expedition (1798-1801). - Étienne-Louis Malus was trained to become a military engineer at the École royale du génie de Mézières and the École Polytechnique in Paris. In 1796 he joined the Engineers Corps of the revolutionary army and quickly ascended the ranks. His official scientific carrier started during the Egyptian campaign when he became a member of the newly founded Institut d'Égypte. Malus' mathematical work was almost entirely concerned with the study of light; he is known for Malus's law, giving the resultant intensity, when a polariser is placed in the path of an incident beam. In 1810 Malus was elected into the Académie des Sciences. That same year the Royal Society of London awarded him the Rumford Medal. - Folded with a minor tear. Well preserved.

4to. 1 p. on bifolium. With autogr. envelope. To "Mademoiselle Cuvier au jardin des plantes", daughter of the French naturalist, apologizes for delaying in seeing his friend Cuvier, and expresses the hope he may be permitted to visit him that evening to show a scientific instrument, "autrement je le laisserai au domestique, dans le cas je vous supplierai de lui offrir mes voeux pour son heureux voyage et son prompt retour [.]".

4to. 1 p. To one monsieur", informing him of his willingness to organise a commission: Monsieur, La Commission dont me charge M. Venturi me paraît très intéressante et peut être un peu difficile. Je ne negligerai rien pour m'en acquitter, mais il faudra du tems. Je vous prie de dire à M. Venturi que je vais commencer les [illegible] nécessaires et que j'aurai l'honneur de l'informer du succès de mes démarches. J'ai l'honneur d'être avec les sentimens les plus distingués []". On headed paper of the Institut de France | Académie Royale des Sciences"; some damaged to edges. Sprache: fr.

Pas de couverture. Condition: Bon. Authentic card signed in the 90s. + Photo 10x14.5 cm (recent print). Size : 7.5x12.5 cm. Condition : see scans please. Certificate of Authenticity and lifetime guarantee. Signé par l'auteur.

Pas de couverture. Condition: Très bon. Rare - Authentic large photo signed in person in Brussels in 2008. Size : 20x30 cm. Condition : see scans please. Certificate of Authenticity and lifetime guarantee. Signé par l'auteur.